Ключевые слова: active, activity, additional, adventure, asphalt, autumn, back, background, bicycle, bicycling, bike, biking, boy, child, childhood, cycle, drive, extra, fence, fun, green, health, healthy, kid, learn, lifestyle, little, nature, outdoor, outside, park, play, recreation, ride, road, safety, single, small, sport, street, tour, track, training, transportation, tree, wheel, woods,